Gai sends Shu on a mission to Oshima, where he hopes to find "the rock that started it all." Shu's whole school club gets a free vacation as his cover, but using other people for his own ends still doesn't sit well with him.

Rumors are flying about what's happening to people in the quarantine zone, and Arisa is losing control over the frenzied student body. To make matters worse, someone's let it slip that turning in members of Funeral Parlor might be their ticket to freedom.

Things have gone too far, and as a mother, it's up to Haruka to do something about it. But fortunately or unfortunately, no one in her life seems willing to let her--and she's not the only one who's made a decision.